A reliable anaerobic chamber is foundational for culturing obligate anaerobes, handling oxygen‑sensitive reagents, and performing consistent microbiological or cell‑culture work. This SOP establishes uniform, repeatable maintenance practices to preserve anaerobic integrity (<5 ppm O₂), stabilize temperature and humidity, prevent cross‑contamination, extend equipment lifespan, and ensure compliance with GLP and biosafety guidelines. It applies to all rigid anaerobic workstations with glove ports, automated gas control, airlock transfer systems, platinum catalysts, and integrated temperature control used in research, clinical, and industrial laboratories. All users, technicians, and principal investigators must follow this document; deviations require written approval and corrective action logging.
Daily pre‑use checks form the first line of defense against unstable conditions. Before any handling, verify main power, control panel functionality, alarm settings, and emergency stop mechanisms. Confirm mixed‑gas supply (typically 85% N₂, 10% H₂, 5% CO₂ or equivalent per manufacturer specification) with sufficient cylinder pressure and secure regulator fittings. Inspect glove integrity: look for punctures, tears, cracking, or loose cuff seals; minor defects may be temporarily patched but require replacement within one shift. Check airlock doors, main chamber gaskets, and O‑rings for dirt, deformation, or moisture that could break the seal. Record real‑time O₂ level, temperature setpoint and actual value, and relative humidity; O₂ above 10 ppm triggers catalyst and gas‑flush recovery before use.Post‑session cleaning prevents organic buildup and contamination. Wipe all interior surfaces—shelves, ports, tool holders, glove inner surfaces—with a non‑corrosive, non‑residue disinfectant such as 70% ethanol or benzalkonium chloride chamber cleaner. Avoid bleach or strong oxidizers that degrade gaskets and inhibit catalyst activity. Remove spills immediately, especially media, biological samples, or chemical reagents, to avoid staining, odor, or microbial growth. Ensure all tools, loops, and consumables are removed or stored properly; leave the chamber orderly for the next user. Log start time, end time, user name, O₂ range, temperature, and any anomalies in the permanent equipment log. This daily routine reduces unplanned downtime, preserves assay repeatability, and protects both samples and personnel.